Bare-backed

Before I could answer, a ravishing creature in one of those long, bare-backed gowns which I’d gathered from advertisements were the modern woman’s evening dress, strolled past our table.

Source: wiktionary

At the edge of the woods stood an Indian in worn buckskins and heavy furs; with him were what looked like two white men bundled up against the cold, and all three were staring at a bearded, bare-backed man who was tied to a small maple tree, the skin on his back already branded with sticky red welts.

Source: wiktionary

There, among the punk sophisticates and bow-ties and shiny shoes and bare-backed women, was Mum, wearing a blue and white dress, blue hat and brown sandals.

Source: wiktionary